Player:Saliba
Would take them over the current duo for these games 9 days out of 10.
But personal opinion aside, Arteta still could've gone for other midfielders in the transfer window but chose to give Xhaka and Elneny their careers at the club back when they both looked out the door. And now he selects them. So this falls on him.
Yeah no doubt, he kept them and they aren't good enough. It doesn't make him incompetent IMO though